This report presents the strong-motion earthquake records on the 7 Augest 1984 Hyuganada earthquake in the port areas in Japan.
　Event data of earthquake are listed with the maximum component accelerations of all the records obtained in the network of the Port and Harbour Research Institute. 4 records of them are presented as acceleration time histories, intergrated velocities and displacements, response spectra, Fourier spectra and loci of accelerations, velocities and displacements. Listings of the digitized records are presented for two records. This report has almost the same procedures for data processing as the preceding annual reports.